diff --git a/lib/zh_avr_pcf8574 b/lib/zh_avr_pcf8574
index 8c6460a..dfebb15 160000
--- a/lib/zh_avr_pcf8574
+++ b/lib/zh_avr_pcf8574
@@ -1 +1 @@
-Subproject commit 8c6460a1d174dc2feb6c12b1432e8affc643ae07
+Subproject commit dfebb15213e1c74e54b7bb142cc9d0e706511269